Improvement in stem-winding watches



um uw Q itl" abated tant' @anni CHARLES E. JACOT, OF NEW YORK, N. Y

Letters Patent No. 86,07 5, dated January 19, 1869.

IBEPROVEMENT IN STEM-WINDING- WATCHES.

The Schedule referred to n these Letters Patent and making part of the same.

To all whom t may cmu/cru Be it known that I, CHARLES E. J AcoT, of the city and State of New York, now in Ghauxde-FondS witzerl land, have invented and made a certain new and useful Improvement in Stem -VVinders for /Vatches and I do hereby declare the following to be a full, clear, and exact description of the said invention, reference being had to the annexed drawing, making part of this speci- `iieatiou, wherein- Figure l represents the watch-brackets and plates, with my' improved winding and setting-apparatus, the parts being in position for winding;

Figure 2 represents the reverse side of the watch, the face being removed, and the parts in the position for Winding;

Figure 3 is a view similar to fig-1, only the parts are moved so that the stem can be used in setting the Ahands and the wheels, shown in red lines; and

Figure 4 is a section at the line :t x.

Similar letters denote the same parts.

My invention relates to that class of watches in which the stem or shank is provided with a head, to be revolved in winding or setting the watch. y

My invention relates to a movable bridge, carrying the spring-barrel and a connection to the hands, in combination with the revolving stem and its gearwheel, the parts being so constructed that, when the bridge and barrel are moved in one direction, the gearing to the hands is disconnected, and the spring-barrel brought into gear with' the stem-Winder, and, when moved in the other direction, the barrel is disconnected from the stem, and the hands brought into gear with the same, for setting.

By this construction, the greatest strength and simplicity are combined, and the winding-portion of the apparatus is intended always to be in gear, ready for use, except when momentarily changed, so that the stem can be used in setting the watch.

In the drawinga is the watch-plate, with a rim, b, around it.

c is the bridge, carrying the arbor d of" the minutehand in the centre of the watch, in any usual manner, except that the arbor d carries outside the bridge thc setting-wheel e, and 'the two are caused to turnl together by a small pin, (see fig. 1 but a slight -play is allowed in the notch occupied by the piu, so that the hands will not be moved by the simple locking or unlocking the gears that act on the wheel e.

The stem f is made, of any usual character, to pass through the' shank oi' lthe watch, and at the inner end is a bevel-pinion, gearing into the bevel-wheel g, that has straight teeth extending above the bevelled teeth, and said wheel revolves upon a fixed stud, 2.

The bridge of the spring-barrel is formed of three plates. The main portion i is a little thicker than the spring-barrel, so as to receive said spring-barrel into a recess.

The plate h is between the watch-plate a and the face. It is of a shape to fit within the rim of said plate, so that it can be slightly moved around within that rim; hence it will move the same as if the arbor d were its axis.

The plate a is removed suiiciently to allow the the sickle-shaped cam It, attached by the screw or rivet 5. This cam-sickle passes through a notch in the rim g' and, when drawn out, as in iig. 3, the bridge and'barrel are moved into' the position for setting; and, when forced in, the bridge and its parts are moved so that the winding can be performed.

The wheel g, remaining in a fixed position, gears into either the teeth of' the winding and ratchet-wheel l of the spring-barrel or into the long pinion o, according to the position of the springebarrel and bridge, the movement thereof being just suiicient to alternately connect and disconnect the respective teeth.

The third plate, n, of the movable bridge of the spring-barrel, is employed as a cover to the ratchetwheel and the gear y.

It also carries an intermediate gear, m, the teeth of which connect with the pinion o and wheel e; and said bridge-plate n may also cover and keep in place the wheel g.

It will be now understood that the wheels m e and pinion o remain in gear, and turn with the hands, and that, in the normal position, the shank is connected, by the gear g, with the ratchet-wheel Z, so that the watch can be wound; but, when the sickle-cam k is drawn out, the spring-barrel t, bridge n, and pinion o will be moved, so as to disconnect l and g, and connect thc pinion 0 with the wheel g, for setting the hands.

What I claim, and desire to secure by Letters Patent, is-

l. A movable bridge, carrying the spring-barrel and' a wheel or pinion, connecting with the hands, in combination with a wheel that isoperated by the stem, and is con nected with the hands, and disconnected from the barrel, or clica corsa., by the motion of the spring-barrel and bridge.

2. The sickle-shaped cam k, in combination with the movable bridge and spring-barrel, substantially as and for the purposes set forth. In witness whereof, I have hereunto set my signa ture, this 26th day of August, A. D. 1868.

CHAS. E. J AGOT.

Witnesses:

D. Fna, EMILE RAMSEYEB. 

